/// <summary>Copies object to a specified document.</summary>
/// <remarks>
/// Copies object to a specified document.
/// <br/><br/>
/// NOTE: Works only for objects that are read from document opened in reading mode, otherwise an exception is thrown.
/// </remarks>
/// <param name="document">document to copy object to.</param>
/// <param name="allowDuplicating">
/// indicates if to allow copy objects which already have been copied.
/// If object is associated with any indirect reference and allowDuplicating is false then already existing reference will be returned instead of copying object.
/// If allowDuplicating is true then object will be copied and new indirect reference will be assigned.
/// </param>
/// <returns>copied object.</returns>
public virtual PdfObject CopyTo(PdfDocument document, bool allowDuplicating)
{
if (document == null)
{
throw new PdfException(PdfException.DocumentToCopyToCannotBeNull);
}
if (indirectReference != null)
{
if (indirectReference.GetWriter() != null || CheckState(MUST_BE_INDIRECT))
{
throw new PdfException(PdfException.CannotCopyIndirectObjectFromTheDocumentThatIsBeingWritten);
}
if (!indirectReference.GetReader().IsOpenedWithFullPermission())
{
throw new BadPasswordException(BadPasswordException.PdfReaderNotOpenedWithOwnerPassword);
}
}
return(ProcessCopying(document, allowDuplicating));
}
private void Write(PdfIndirectReference indirectReference)
{
if (document != null && !indirectReference.GetDocument().Equals(document))
{
throw new PdfException(PdfException.PdfIndirectObjectBelongsToOtherPdfDocument);
}
if (indirectReference.IsFree())
{
ILog logger = LogManager.GetLogger(typeof(iText.Kernel.Pdf.PdfOutputStream));
logger.Error(iText.IO.LogMessageConstant.FLUSHED_OBJECT_CONTAINS_FREE_REFERENCE);
Write(PdfNull.PDF_NULL);
}
else
{
if (indirectReference.refersTo == null && (indirectReference.CheckState(PdfObject.MODIFIED) || indirectReference
.GetReader() == null || !(indirectReference.GetOffset() > 0 || indirectReference.GetIndex() >= 0)))
{
ILog logger = LogManager.GetLogger(typeof(iText.Kernel.Pdf.PdfOutputStream));
logger.Error(iText.IO.LogMessageConstant.FLUSHED_OBJECT_CONTAINS_REFERENCE_WHICH_NOT_REFER_TO_ANY_OBJECT);
Write(PdfNull.PDF_NULL);
}
else
{
if (indirectReference.GetGenNumber() == 0)
{
WriteInteger(indirectReference.GetObjNumber()).WriteBytes(endIndirectWithZeroGenNr);
}
else
{
WriteInteger(indirectReference.GetObjNumber()).WriteSpace().WriteInteger(indirectReference.GetGenNumber())
.WriteBytes(endIndirect);
}
}
}
}
